/*
 * Copyright 2009-2010 the original author or authors.
 *
 * Licensed under the Apache license, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.internna.iwebjtracker.project.validation;

import org.internna.iwebjtracker.project.model.IWebJTrackerUser;
import org.internna.iwebjtracker.project.model.Module;
import org.internna.iwebjtracker.project.model.Project;
import org.internna.iwebjtracker.project.model.Project.ProjectType;
import org.internna.iwebjtracker.project.model.Version;
import org.internna.iwebjtracker.server.connection.ConnectionDetails;
import org.internna.iwebjtracker.server.scm.SourceControlManagementServer;
import org.internna.iwebjtracker.server.scm.model.ItemInfo;
import org.internna.iwebjtracker.utils.UrlUtils;
import org.springframework.stereotype.Service;

import static org.internna.iwebmvc.utils.StringUtils.hasText;
import static org.internna.iwebjtracker.project.validation.Errors.*;

/**
 * Validates all the data in a project
 *
 * @author Jose Noheda
 * @since 1.0
 */
@Service("freeFormProjectValidator")
public class FreeFormProjectTypeValidator<C extends ConnectionDetails, M extends Module<P, M>, V extends Version<U, P, V>, U extends IWebJTrackerUser, P extends Project<C, M, V, U, P>, I extends ItemInfo<C, M, V, U, P>> extends AbstractProjectTypeValidator<C, M, V, U, P, I> {

    /**
     * Constructs a project validator assuming FreeForm type.
     */
    public FreeFormProjectTypeValidator() {
        super(ProjectType.FreeForm);
    }

    /**
     * Meant to be used by subclasses that want specify a project type.
     * @param projectType
     */
    protected FreeFormProjectTypeValidator(ProjectType projectType) {
        super(projectType);
    }

    /**
     * Designed to be overriden by subclasses before any validation has taken place.
     */
    protected Errors preValidate(SourceControlManagementServer<?, C, M, V, U, P, I> server, P project) {
        return null;
    }

    /**
     * Designed to be overriden by subclasses after this validator passed all tests.
     *
     * @param project a non null project
     * @return null by default (no error)
     */
    protected Errors postValidate(P project) {
        return null;
    }

    /**
     * Validates a given project.
     *
     * @param server a non null server
     * @param project a non null project
     * @return the i18n key of the error or null/empty.
     */
    @Override public final Errors validateProject(SourceControlManagementServer<?, C, M, V, U, P, I> server, P project) {
        preValidate(server, project);
        Errors validation = doValidation(project);
        return validation != null ? validation : postValidate(project);
    }

    private Errors doValidation(P project) {
        if (!hasText(project.getProjectName())) {
            return PROJECT_HAS_NO_NAME;
        }
        if (project.getCurrentVersion() == null) {
            return PROJECT_HAS_NO_VERSION;
        }
        return UrlUtils.isValidUrl(project.getHomePage()) ? null : PROJECT_HAS_NO_HOME;
    }

}
